Custom Django user model with UUID as the id field

Question

I am trying to extend a User model and add some fields and below is my approach:

Class UserProfile(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    mobile_number = models.CharField(max_length=20)
    gender = models.CharField(max_length=2, choices=GENDER_CHOICES)
    location = models.ForeignKey(Location, blank=True, null=True)

class User_One(UserProfile):
    field_1 = models.CharField(max_length=20)
    ....
    ....

class User_Two(UserProfile):
    field_1 = models.CharField(max_length=20)
    ....
    ....

So basically there are two types of users User_One and User_Two and now whenever we save the two types of users into database the following happens

1. A User model record will be created with separate id of values 1,2,3 etc.,
2. A User_One model record will be created with id's 1,2,3
3. A User_Two model record will be created with id's 1,2,3

So for each every model record saving, Django or database was generating id's 1,2,3.

But I got a requirement that User model should generate a uuid for id field value in place of integers, was that possible?

I mean something like below

class User_Profile(models.Model):
    id = models.IntegerField(default=uuid.uuid4)

Answer 1

There are couple extra steps required to use uuid as a primary key:

1. Use UUIDField for your id field instead of InegerField because uuid isn't exactly an integer
2. Specify primary_key=True for that field

To get the custom user model, subclass it form django.contrib.auth.models.AbstractUser and specify AUTH_USER_MODEL in your settings:

import uuid
from django.contrib.auth.models import AbstractUser
from django.db import models

class UserProfile(AbstractUser):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4)

Then in your settings file:

AUTH_USER_MODEL = 'youruserapp.UserProfile'

It's important to do that before you have any migrations (created a database) or this won't work.